Registration control for pipe organs



June 25, 1935. D. s. BARROWS REGISTRATION CONTROL FOR PIPE ORGANS Original Filed Sept. 18, 1928 4 Sheets-Sheet 1 FIG. 3

FIG.

gwucnlo'c Donald 5. Barrows June 1935- D. s. BARROWS 2,006,291

REGISTRATION CONTROL FOR PIPE ORGANS Original Filed Sept. 18, 1928 4 Sheets-Sheet 2 gin 0014 5010 Donald 5'. Barrows June 25, 1935- 5. BARRQWS 2,006,291

REGISTRATION CONTROL FOR PIPE ORGANS Original Filed Sept. 18, 1928' 4 Sheets-Sheet 3 gwue'ntoc Donald 5'. Barrows June 25, 1935. D. s. BARROWS 2,006,291

REGISTRATION CONTROL FOR PIPE ORGANS Original Filed Sept 18, 1928 4 Sheets-Sheet 4 Q 84- 50 I I an as FIG. 6

gwuenioz Donald 5. Barrows Patented June 25, 1935 UNITED sures PATENT REGISTRATION CONTROL FOR PIPE ORG/ANS Donald Barrows, Rochester, N. Y.

Claims.

The invention relates to pipe organs and has specialreference-to the control of registration.

Th'cprincipal object of the invention, generally stated, isto provide means whereby the player s may more conveniently prepare for a change in theregistration, while playing, and in advance of the time at-whichl he desires the new registration to become effective.

It "is well known that onmodern organs having 10" four or more manual key boards and a. large number of stop knobs or keys and couplers, the pioblem'of securing a simultaneous change in registration: for several divisions of the organ has heretofore usually been solved by one or both if r of twomethods, viz: a large number of visible or absolute combination actions controlled by pistons under-themanuals' or toe studs over the pedals, or by'the combination system known as blind or dual, controlled by similar pistons or toe studs.

With'the'visible combination system, the knobs, keys'or tablets controlling the'action of stops or couplers desired for a certain registration are simultaneously moved to the on position by the pressure of the player on a piston or toe stud, thecombination mechanism having previously been set by the player to move these particular knobs; keys ortablets, on the pressing of a particular'pis'ton'or' stud, and all other stops and couplers in the same organ division are moved to the oil? position by the same piston pressure. It' 'should be understood that in modern organs having electric or electro-pneumatic actions the knob or other controlling means when in the on position simply completes an electrical circuit, thereby energizing a suitable mechanism which admits air to a chest division or, to the motor of a coupler switch, or of some similar device. It is, therefore, possible that a stop or couplermay be on orofi without reference to the position 4:0 of-th'e console controlling means by completing or breaking the proper electrical circuit through other means.

The blind combination system is usually set in the same or equivalent manner as the visible system and is operated by similar pistons or toe studs; but itacts directly on the stop or coupler circuits regardless of the position of and without moving theknobs, keys or tablets. A blind combinatiorr may act to retain the active circuits "which"are"visib1y on or more usually it may break all circuits which it is not set to close. Under thelatter-arrangement the position of the stop'knobs or keys and couplers may be changed by-hand or by an auxiliary visible combination system whiletheorgan action isunder the control of'ablind combination, without change=in-the actual registration untilthe blind combination is released, whereupon the active circuits immediately respond to the-position of the 'kn0bs, keys or tablets at the time of such release.

With the more usual :visible combination systerm, the I large number :of combinations necessary, for control of all divisions of the organ:adds-.- materially to the cost of the organ and "one;-'two or more combination pistons must berpressedzlO simultaneously and at the exact instant a changein registration is desired.

While the blindor dual combinatlomv system permits advance registrational.preparation", through the moving of knobs, keys-ror tabletssbylli hand or -bya separate visible combination 'systemv controlled by otherpistons, it'isnot favored: by:- many players because there is: usually no'visible indication: as to which steps or couplers. are" actually efiective; and with" aw large number? of, 20"

blind combinations thisplacesaheavyiburdem on the players memory and seriously handicaps him' whileplaying'an organ withwhich rhe is not per-*- fectly familiar."

Itis'with the above various facts imviewsthat I have devised the presentiinvention WhiCh11hh8i for-an important'object the'provision ot'a stop action system whereby thesplayer' may at his option control the registration; the usual manner. by hand :movement of i stop -andtcouplerr v controls, or by" the visible combinationsat 1 the:- moment'of desired change; orwherebmhe-may prepare for or'set a registration to'be playedat a later time without disturbing 1 the :then present 1 registration, means being :provided: whereby 1 the advance 'registrationmay be made efl'ective whsen' the change'is desired, it being. a:feature thatas many corrections. or changes in the'advance setting as desired maybe made during a present registration without having anyeifct thereupon" and without requiring the operation of 'anyspecial' release means.

Another object of the invention is to "provide an apparatus of this character whichlmay'be' operated by a combinationof mechanical? and electrical'means or 'b'ythe combination ofelc- I trical and pneumatic means, depending upon the preference of the manufacturer and otherv condi; tions which may exist, such as the-type of organ, etc.

Anotherlobject of, the invention is toprovide a control apparatus of this-character WhiChzWill not involve any undue complexity and which may;

consequently: be installed at reasonable .cost

springs 12 and i3.

which will, moreover, be highly efficient in action and a. general improvement in the art.

To the attainment of the foregoing and other objects and advantages, as will hereinafter appear, the invention preferably consists in the various embodiments to be hereinafter more fully described and claimed, and illustrated. in the accompanying drawings in which:-

Figure l is a somewhat diagrammatic view of a portion of a pipe organ of the electrically operated type showing a mechanical means for effecting future setting of the registration, parts of the apparatus being shown in elevation and other parts in section. I

Figure 2 is a plan view with parts broken away and in section.

Figure 3 is a detail cross section taken on the line 3-3 of Figure 1.

Figures 3a, 3b and 3c are detail sectional views, taken respectively on the lines 2-2, bb, and 0-0 of Fig. 1, illustrating a contact arrangement.

Figure 4 is a somewhat diagrammatic view showing a different mechanical means for effecting electrical control'of a future registration.

Figure 5 is a view, partly in section and partly in elevation, with diagrammatic features included, illustrating a system of electro-pneumatic control for the registration.

Figure 6 is a sectional view of an air pressure control means used in connection with this modification.

Referring to the drawings'in detail, it will be observed thatI have made no attempt to illustrate any details of the organ construction itself as the invention relates only to the means for controlling the registration. Insofar as the general organ construction is concerned, it is thought suflicient to show a portion of a pipe chest i and a'stop action chest 2, each individual stop action being controlled by an electro-magnet 3 so arranged and related to a valve mechanism and fluid pressure supply, not shown, that when the magnet is energized all the pipes 4 in that particular rank (stop) are subject to pressure air and will. sound when the proper action key (notshown) is pressed.

The stop key, which is essentially of more or less ordinary pattern, is indicated at 5 and is rockably mounted ona fulcrum rod (Sand adapted to be held in the on or ofi position by a suitable spring I which engagesthe key and which likewise engages some stationary portion 8 of the organ. This key 5 carries a segment 9 here represented as formed with an arcuate slot it, each 'endoof which contains-a pair of followers H between the respective members of each pair of which are springs l2 and i3. Likewise fulcrumed upon, the rod 6 is an arm l4 preferably of yoke form and straddlingthe segment, the yoke having a bight portion l5 carrying a filler l5 and extending through the slot It with the ends of the filler engaging between the inner followers l l. Normally, this arm or yoke is held in intermediate position with respect to the segment by the The yoke is independently movable with respect to the key 5 but it is apparent that upon movement of the key the yoke or arm would be correspondingly moved if, no means were provided for preventing it. However, 1 pro -'vide a lock bar IT which is capable of movement towards or away from yoke arm i ias the result of actuation of some control means, not shown, and this look bar is adapted 'to be moved into obstructing relation to the projecting end of the 'yoke'or arm M. as shown by full lines in Figure 1,

the non-obstructing position being shown by dotted lines in the same figure. It is clear that when the lock bar is in the obstructing position illustrated, downward movement of the key 5 will not cause movement of the yoke or arm M. The result of movement of the key 5 will be upward movement of the segment 9 and compression of the spring l3 so that upon subsequent movement of the lock bar ill to non-obstructing position the power stored in the spring 13 will throw the yoke or arm M upwardly. The purpose of this and the advantage taken of the action will be explained hereinafter.

Arranged for engagement with yoke or arm M are contacts l8, l9 and 2 5. Contact 65 is in continual engagement with it regardless of the position of the latter and is connected by a conductor 28 with one terminal of a generator or other current supply source 25 which has its other terminal connected with electro-magnet 3 by means of a conductor 22. Contact i9 is adapted to engage with M only when the latter is in its down or off position and is sometimes used for setting combinations but as it does not relate to the present invention, it need not be further here discussed. Contact 2 1 is adapted to engage with M only when the latter is in the up or on position and is connected by conductor 25 with the other terminal of the electro-magnet 3, therefore, when key 5 is in its down or on position and, therefore, yoke or arm i l in its corresponding up position, magnet 33 is energized,

and through the operation of auxiliary appa-- ture'has nothing to do with the present inven-- tion it may be disregarded. If the stop key 5 be moved downwardly into its on position while the lock bar ll is in its forward position, that is, in obstructing relation to the projecting end of the yoke or arm l iso to prevent movement thereof, the only immediate result is the upward swinging of the segment 9 and compression of the spring !3, the yoke or arm M still remaining out of engagement with the contact 24. If the stop key 5 be moved downwardly into the on position while the lock bar it is in retracted position, or in non-obstructing relation to the end of the yoke or arm 54, or if the lock bar be retracted subsequent to the downward movement of the stop key 5, the yoke or arm i l will be forced upwardly by the spring l3 and will engage the contact 24, thus completing the circuit fromthe source 2|, conductor 20, contact l8, yoke or arm which does not require it, he then through ap I propriate mechanism, not shown, brings the lock bar I? to its forward position, whereupon it will engage beneath the yoke or arm it which has been thrown to its elevated position, as above described. At a convenient time he would then lift the key 5 to its off position, either directly.

by hand, or through the operation of a visible combinatiorr' wherein' this stop is set to be off, butthis would'haveno immediate effect on the yoke or arm I 4 which'would be held elevated by the lock bar II, the circuit being closed through the contacts I8 'and 24. When it is desired that the proper change in registration shall become eil ective, the player releases the lock bar I"! whereupon all the yokes or arms I4 which are forcibly held away from their normal relative positions with respect to their segments 9 will immediately" resume their normal positions through thewithdrawal of the lock bar. By this means; it is cl'ear that while playing any particular registration, that is to say, with any desired number of'diffcrent stops in their on or off positions, the player mayinove the stop keys withoutaflecting the registration played at that particular time. This may be done at leisure, that is to say, at anyconvenient times during 'he'playing in a certain registration so that the player is not under the burden of hurriedly throwing the stops on or off by hand; or by pressing several visible combination pistons as described above at the conclusion of a certain musical passage preparatory to playing another passage requiring a different registration. Furthermore, the position of the stop keys will indicate what'the next registration will be. As many of the steps may. be throwninto off or on position as may be desired in accordance with the requirements of'the musical composition being played 'and'corrections or changes in the future registration may be made without making any immediate change-the present registration being maintained by the cooperation of the lock bar with the yokes or arms I4 regardless of whether they bein the off or the on position, the change in-registration occurring only upon release of the lock bar.

The same general action can be brought about by the use of the electrical means shown in Figure 4 instead of the above described mechanical means, In this modification, the segment, locking bar. and associated parts are omitted and are replaced by a simple contact blade 23 carried by the stop key 2'! corresponding to the key 5, this blade being always engaged by a contact and adapted to be brought into engagement with selected contacts 23 and which are connected, respectively, by conductors 3I and 32 with elec- 33 and 34-positioned opposite sides of and adapted to attract an armature 35 carried by pivotedcontact arm SS-adapted to engage and bridge pair of contacts3'l and 38, the former of which is connected by a conductor 39' with one terminal of the electro-magnet 3 and the latter of which" is connected by a conductor 40 with the contact 28; The source of current 2! is connected with the conductor 40 and by a conductor 4! with the other terminal of the electro-magnet The other terminals of the electro-magnets 33' and '34 are, of course, connected to the return side of the source 2 I, but as it is desirable to lock the stop action contacts temporarily while pre paring a future registration it is necessary to have circuit interrupter interposed in this connection. While any convenient switch device may be provided for the purpose I have, for the sake of illustrati shown a key 42 similar to the stop key 2'! and carrying a contact 43 always engaging a contact 44 connected with the source by a conductor 45: The contact blade 43 is movable into or outer engagementwith a stationary contact 46 to which thesecond mentioned terminals of the electro magnets 33 and 34 are 'connected by conductors 41 and 4B.

In the operation of this form it will be observed that the contacts 31 and 38' correspond tothe contacts I8 and 24. When the key 2'! is thrown downwardly into its on position the blade 26 engages the contact 29 so that the circuit is closed from the source 2 I, conductor 40, contact 28,- blade 25, contact 23, conductor 3|, e1ectro-magnet'33; conductor 4i, conductor 48, contact 46, blade 43, contact 44, and conduct-or 45, back to the source. The electro magnet 33 is thus energized and attracts the armature 35, resulting in movement of the pivoted contact 35 into bridging engagement with the contacts 31 and 38. When this occurs current flows from the source 2 I, through thecon ductor 48, contact 38, contact arm 36; contact 31,

conductor 39, electro-magnet 3, and conductor 4 I, back to the source, thus energizing the electro magnet 3 and placing the rank of pipes 4' in condition to sound upon depression of the 'manual keys. In order for this action to occur,it is necessary that the key 42 be in circuit-closing position, as it is clear that if the key 42 be in circuit breaking position movement of the stop key M to engage the contact plate 26 with either the contact 29 or the contact 30 will haveno effect.- Clearly then, if the switch key 42 "be in the off or circuit breaking position the stop key 21 may be moved into either off or on position while playing in a certain registration without causing any change in the registration until the switch key 42 is closed. As long as the switch key 42 is closed changes in the present registration are effected by moving the stop key 27; Assuming that the stop key 21 is in the on position and the player desires to omit that stop in the next registration, it is merely necessary, while the witch key is open, to' throw the stoplkeymzl to the elf position to bring the blade 26' into engagement with the contact 30 so that whenit is desired to throw the future or advance set registration into action mere closing of the'switch key. 42 will cause current to flow from the source 2|, through the conductor 40', contact 28, contact blade 23, contact 39, conductor 32, magnet 34,- conductor 48, contact 43; contact blade 43, contact 44 and conductor 45, back to the source, the resultant energization of the magnet 34' at tracting the armature 35 and withdrawing the contact arm 35 from bridging engagementwith the contacts 3! and 38. This breaks-the circuit through the electro-magnet 3 and renders the particular rank of pipes 4 inoperative. It is apparent that at all times individual manual control of the stop action as well as advance setting thereof may be very conveniently accomplished.

In Figure 5, I have illustrated an electropneumatic system or arrangement embodying'a relay following the general principle disclosed :in the form just described. In this modification I have shown an air chest 50 with a chamber 5I* therein containing an air pressure normally above that of the atmosphere. For each stop action to be controlled there is the following mechanism: A puff or diaphragm 52 covering a chamber 53, 'a pufi or diaphragm '54 covering a chamber 55; a" rod or its equivalent 56 connecting both di'a' phragms, contacts 51 and 58, and an electromagnet 53. These are the general elements which are combined with and relatedto the various -detailed features to be described. The contacts 51 and 53 are located at opposite sides of therod i 58 and are mounted on a suitable insulating sup-* port so; their free ends being directed inwardly" or toward each other, as at 6!, so as to be capable of bridging engagement by a contact 52 carried by the rod 56 and preferably adjustable therealong as by the means disclosed. A suitable packing 54 is provided where the rod 55 passes into the chamber 55 from the chamber 55. The chambers 53 and 55 communicate through passages 55 and 66 1 and the latter leads to a small chest Bl having a release port 58 normally closed by an armature 69 adapted to be attracted by the poles of the magnet 59; The small chest 6'! communicates with the chamber 5i through a pressure port Til.

The control means for this pneumatic mach anism may include a stop key 'N somewhat similar or corresponding to the stop keys 5 and H and mounted in the same or any other preferred manner. This stop key carries a contact "i2 always in engagement with a contact l3 and adapted to engage a contact 75. The source of current 2| has one terminal connected by a conductor 15 with the contact l3 and has its other terminal connected by a conductor l6 with one terminal of theelectro-magnet 59, the other terminal of which is connected by a conductor F? with the conductor '14. The first-mentioned terminal of the source is connected by a conductor 18 with one terminal of the electro-rnagnet 3, the other terminal of which is connected by a conductor i9 with the contact 58. The contact 51 has connected therewith a conductor 89 leading to the second-mentioned terminal of the source 2|.

In the operation of this form of the invention, assuming-that the parts are initially in the po sition shown in Figure 5, it will be seen that when the player depresses the stop key "ll to the on position the blade 72 will engage the contact i l and, of course, the contact When this is done current will flow from the source 2!, conductor -15, contact '13, contact plate #2, contact 74, conductor I1, electro-magnet 59, conductor l5, back to thesource 2|. The resultant energization of the electro-magnet 59 causes attraction of the armature 69 which closes the pressure port it and uncovers the release port 68. Air pressure within the chambers 53 and 55 then exhausts through the passages 66 and 65 into the chest 67 and thence out through the port 68. As the pressure within the chamber 5| is greater than atmospheric, the diaphragm 52 is forced to the left, resulting in corresponding movement of the rod 55 so that the contact 62 thereon will enage against the end portions 55 of the contacts 57 and bridge them, thus closing the circuit from the source 2| through the conductor l8, electromagnet 3, conductor 79, contact 58, contact 52, contact 51, and conductor 85, back to the source. The resultant energization of the electro-magnet 3 places the pipes 4 in that particular rank in condition for sounding upon depression of the manual keys. to the o position so that the blade 72 disengages the contact M, the circuit just described is broken at this point and the magnet 59 is deenergized, permitting the armature 63 to drop and close the release port 58 and open the pressure port 10. Pressure within the chamber 5! then passes through the port H3, chest 61, and passages 65 and 66 into the chambers 53 and 55, bulging the diaphragm fi l to the right and. causmg corresponding movement of the rod 56 so that the contact 62 will disengage the ends SI of the contacts 51 and 58, thereby breaking the circuit through the electro-magnet 3 and rendering the associated rank of pipes 4 inoperative. The pres- When the stop key M is thrown sure in 53 and 5! being equal, diaphragm 52 moves to the right without resistance when rod 55 is moved by diaphragm 54.

In order to prepare for registration and lock the stop action in the last position, it is merely necessary that the player relieve or release the air pressure from the chamber 5!, and While thus released the energization or deenergization of the magnet 59, by movement of the stop key H into one position or the other, Will have no effeet on the rod 55 which will remain stationary for the reason that atmospheric pressure only is on both sides of both diaphragms 52 and 54. When air pressure is restored within the chamber 5| the rod 56 will at once respond to control by energization or deenergization of the magnet 59. To prevent the rod 56 from drifting one way or the other when the pressure is relieved in the chamber 5!, I may provide a drag device which may be simply a pair of springs 88 mounted on the support 85 and frictionally engaging the end portion of the rod. Means for releasing or restoring the air pressure within the chamber 5! may conveniently be similar to any of the several forms of chest action, one of which is shown in Figure 6 which shows a longitudinal'section of one end of chest 55, and to which is attached action chest 82 the interior of which is supplied with pressure air from pipe $3. Top board 84 of chest 56 is provided with exhaust opening 85 adapted to be closed by valve 35, and bottom board is provided with opening 8? into 82, adapted to be closed by valve 88, both 86 and 88 being connected as by rod 39, which is connected through arm 9E! with movable member of bellows 82. Passage 83 connects interior of 92 with small chest M, which has pressure port 95 connecting with 82, and exhaust port 95. Armature 9'! is adapted to close either 95 or 95 upon the energizing or deenergizing, respectively, of magnet 98. During normal control of the stop and coupler actions by the manual means, 98 is energized, closing the port 95, and opening the port 55 so that pressure in 82 holds bellows 92 in the collapsed position, drawing down rod 89, closing exhaust opening 85, and placing 5| in communication with 82 through 81 whereby pressure in 5! and B2 is equal and the several rods 55 will respond to the action of their respective keys 1!.

When 93 is deenergized through breaking of contact by device similar to 42, 43, M, and 65, Figure l, armature 9'! falls closing 95, opening 95, allowing pressure air from 32 to pass through 95, 9d and 93 into bellows 92, expanding it and thereby raising 89, closing opening 81 by valve 53, thus cutting off flow of pressure air from 82 into 5.1., and by simultaneously lifting valve 85 from opening 85 allowing pressure in 5| to be reduced to atmospheric through escape of pressure through 85.

From the foregoing description and a study of the drawings it will be apparent that I have thus provided several Ways of accomplishing the general object of the invention, there being no particular restriction as to the precise details disclosed as they may be readily varied. Summing up, it will be clear that with an organ equipped with the stop action system disclosed in this invention, the player may at his option control the registration in the usual manner by hand movement or stop and coupler controls, or by the visible combinations, at the moment of desired change, or by closing a special switch, the organ will remain under control of the registration as last set, until the said special switch is released. During the period of special switch control the player may visibly change the combinations by pistons or toe stud or by hand, or by both methods, and these changes can be made or altered at convenient intervals and will not control the actual registration until the special switch is released. The player, therefore, can see the actual future registration and correct it if necessary before he actually uses it. The number of visible combinations may, therefore, be reduced if desired as one which is approximately correct can be used and afterwards altered by hand. It is believed that the construction, operation and advantages will be readily apparent to one skilled in the art without further explanation.

While I have shown and described the several preferred embodiments of the invention, it should be understood that the disclosure is merely illustrative of an exemplificaiion of the principles involved and that the right is reserved to make many changes in the arrangement and combination of parts, and particularly in the detailed construction, provided such variations and modifications constitute no departure from the salient features of the invention or the scope of the claims hereunto appended.

This application is a substitute for applicants prior application, Serial No. 306,726, filed September 18, 1928, which has since become abancloned.

Having thus described my invention, what I claim is:-

1. In an organ, in combination with stop actions, stop keys normally indicating by their position whether such stop actions are on or off, each key carrying means for closing an electric circuit, pneumatic control means operated by said circuit for effecting desired movement of said stop actions, and means for rendering said pneumatic means ineffective, whereby the action of said circuit closing means may be delayed until said pneumatic means is rendered effective.

2. In an organ, a stop action and registration control, said registration control comprising a stop key and secondary control means associated therewith, said stop key having means associated therewith for actuating its stop action, said secondary control means selectively rendering said actuating means effective and ineffective to cause operation of said stop action upon actuation of said stop key.

3. In an organ, stop actions and registration controls, each control con'iprising a stop key and secondary control means associated therewith, each stop key having means for actuating its stop action, said secondary control means serving, when in one position, to operatively disconnect said stop actions from the control of said keys, and movable to another position to restore control to the stop keys, so that the stop actions will respond to the stop key settings.

4. In an organ, stop actions and registration controls, each control comprising a stop key and secondary control means associated therewith, each stop key having means for actuating its stop action, said secondary control means serving, when in one position, to operatively disconnect said stop actions from their controls, and movable to another position to restore control to the stop keys, so that the stop actions will respond to the stop key settings at the time of such movement, and means for moving said secondary control means to either position.

5. In an organ, stop actions and registration controls, each control comprising a stop key, said stop keys being adapted for individual manual movement and also for group movement, and normally indicating by their positions whether said stop actions are on or oil, secondary control means associated with said stop keys, and means for moving said secondary control means to one position to operatively disconnect said stop actions from the control of the respective keys, or to another position to restore control to the stop keys, so that the stop actions will then respond to the settings of said keys at the time of such movement.

6. In an organ, stop actions and registration controls, each control comprising means for normally operating said actions and adapted for individual manual movement and also for group movement, and secondary control means associated with said operating means, actuating to operatively disconnect said stop actions from their control when in one position and movable to another position to restore control to said operable means, so that the stop actions will respond to the settings of said means.

'7. In an organ, registration controls comprising stop keys, stop actions normally controlled by said keys, and secondary control means which in one position operatively disconnect said stop keys from the respective stop actions, thereby permitting said keys to be moved to a desired setting without afiecting said stop actions, and in another position restores the connection between said stop keys and stop actions so that the latter automatically respond to the settings of the stop keys at the time of restoration.

8. In an organ, in combination with stop actions, stop keys normally indicating by their position whether such stop actions are on or off, a segment carried by each key, a yoke straddling each segment, means pivotally mounting said keys and yokes for relative movement, resilient means mounted on each segment and tending to maintain the associated yoke in a given position with respect thereto, locking means for holding each yoke in a given position irrespective of the position of the associated key, and means for connecting said yokes to said stop actions.

9. In an organ, in combination with stop actions, stop keys normally indicating by their position whether such stop actions are on or oiT, means for closing an electric circuit carried by each key for effecting desired movement of the stop actions, and secondary control means for said electric circuits, whereby the action of said circuit closing means may be delayed until corresponding actuation of said secondary means.

10. In an organ, stop actions and registration controls, each registration control comprising a stop key, and secondary control means associated with said keys, each stop key having means associated therewith for normally actuating its stop action in accordance with the setting of the key, and said secondary control means being movable to one position to prevent, and to another position to permit, actuation of said stop actions, through said actuating means, to conform with the key settings.

DONALD S. BARROWS. 

